Package includes:You will get 4 pieces of spring loaded bifold door top roller guide wheel and 4 pieces of top pivot, in quantities to meet your daily use and replacement, making it an ideal bifold door repair hardware kit.Product size:Bi-fold door guide wheel hardware kit fits doors from 1 inch to 1-3/8 inch thick.Guide wheel is 2 inches long, wheel OD 7/8 inches, shaft OD 3/8 inches; top pivot is 2 inches long, metal head OD 1/4 inches, shaft OD 3/8 inches, please check the size chart before purchase.Efficient repair:With our bi-folding door hardware kit, you can quickly replace and repair broken old doors without replacing the door, suitable for repairing bi-folding closet doors, sliding doors, cabinet doors and so on.Easy to use:The guide wheels of the kit are fitted with springs to secure them to the door opening. Press the built-in spring, the distance between the door and the track will be slowly adjusted to make it quickly into the bracket and track to complete the installation.Reliable material:Closet door rollers are made of high quality nylon, stainless steel and hard plastic, precise size, well-made, reliable quality, waterproof and moisture-proof. It will not cause the parts to break due to frequent sliding, which can ensure long-term use.